dc.contributor.author | Ihlen, Peter M. | |
dc.coverage.spatial | 18252 Majafjellet | |
dc.date.accessioned | 2020-07-15T08:35:03Z | |
dc.date.available | 2020-07-15T08:35:03Z | |
dc.date.issued | 1993 | |
dc.identifier.issn | 0800-3416 | |
dc.identifier.uri | https://hdl.handle.net/11250/2666288 | |
dc.description.abstract | The report presents the corelog for 47 diamond-drillholes (total corelength: 3430 m) drilled by A.S. Sulfidmalm and Terra Mining A\/S in the periods 1980-82 and 1985-86, respectively. From the corelogs, the summary corelog-diagrams and the drillhole profiles several conclusions can be drawn regarding ore control and ore genesis. The native gold being generally fine-grained (1-100 um) is strongly intergrown with arsenopyrite and is only locally found as tiny visible grains. Mineralisation of economic potential occurs along a system of brittle dextral shear zones at the margin of the Early Silurian Oksdal granite massif. The mineralisation constitutes fracture fillings, veins and breccias of arseno- pyrite which nearly invariably are hosted by the competent granitoids and pre- existing quartz veins along the shear zones. Although not much can be said about average ore grades the deposit is estimated to have a total reserve potential in the range 550 000 - 850 000 tonnes for a 1 m wide and 100 m deep ore zone with ore density of 2,75 tonnes\/m3. 250 000 tonnes of this preliminary estimate probably contain enough gold for small scale mining. Further work is recommended. Frie emneord: Kaledonidene Malmpotensiale | |
dc.language.iso | eng | |
dc.relation.ispartofseries | NGU-Rapport (93.003) | |
dc.rights | Navngivelse 4.0 Internasjonal | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.subject | MALMGEOLOGI | |
dc.subject | GULL | |
dc.subject | BORHULLSLOGGING | |
dc.title | The Kolsvik Au-As-deposit, Bindal, North-Central Norway, I: Corelogs | |
dc.type | Report | |
dc.description.localcode | 34194 | |
dc.source.pagenumber | 322 | |